<template>
    <div>
        <!-- 面包屑导航 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>商品管理</el-breadcrumb-item>
            <el-breadcrumb-item>参数列表</el-breadcrumb-item>
        </el-breadcrumb>
        <!-- 卡片视图 -->
        <el-card>
            <!-- 警告框 -->
            <el-alert title="注意:只允许为第三级分类设置相关参数!" type="warning" :closable="false" show-icon></el-alert>
            <!-- 选择分类区域 -->
            <el-row class="cat_opt">
                <el-col>
                    <span>选择商品分类:</span>
                    <el-cascader
                    v-model="selecteCateKeys"
                    :options="cateList"
                    :props="cascaderConfi"
                    @change="selecteChang"></el-cascader>
                </el-col>
            </el-row>
            <!-- tab页签 -->
            <el-tabs v-model="activeName" @tab-click="handleTabClick">
                <el-tab-pane label="动态参数" name="many">
                  <el-button type="primary" :disabled="isBtnDisabled" @click="showAddParams">添加参数</el-button>
                  <!-- 动态参数列表 -->
                  <el-table :data="manyParamsData" border stripe>
                    <!-- 展开行 -->
                    <el-table-column type="expand">
                      <template slot-scope="scope">
                        <el-tag
                        v-for="(item,i) in scope.row.attr_vals"
                        :key="i"
                        closable
                        type="success"
                        @close="deleteParams(scope.row,i)">
                        {{item}}
                        </el-tag>
                        <el-input
                        class="input-new-tag"
                        v-if="scope.row.inputVisible"
                        v-model="scope.row.inputValue"
                        ref="saveTagInput"
                        size="small"
                        @keyup.enter.native="handleInputConfirm(scope.row)"
                        @blur="handleInputConfirm(scope.row)">
                        </el-input>
                        <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>
                      </template>
                    </el-table-column>
                    <el-table-column type="index"></el-table-column>
                    <el-table-column label="参数名称" prop="attr_name"></el-table-column>
                    <el-table-column label="操作">
                      <template slot-scope="scope">
                        <el-button size="mini" type="primary" icon="el-icon-edit" @click="editParamsBtn(scope.row)">编辑</el-button>
                        <el-button size="mini" type="danger" icon="el-icon-delete" @click="removeParams(scope.row)">删除</el-button>
                      </template>
                    </el-table-column>
                  </el-table>
                </el-tab-pane>
                <!-- 静态属性列表 -->
                <el-tab-pane label="静态属性" name="only">
                  <el-button type="primary" :disabled="isBtnDisabled" @click="showAddParams">添加属性</el-button>
                  <el-table :data="onlyParamsData" border stripe>
                    <!-- 展开行 -->
                    <el-table-column type="expand">
                      <template slot-scope="scope">
                        <el-tag
                        v-for="(item,i) in scope.row.attr_vals"
                        :key="i"
                        closable
                        type="success"
                        @close="deleteParams(scope.row,i)">
                        {{item}}
                        </el-tag>
                        <el-input
                        class="input-new-tag"
                        v-if="scope.row.inputVisible"
                        v-model="scope.row.inputValue"
                        ref="saveTagInput"
                        size="small"
                        @keyup.enter.
                        native="handleInputConfirm(scope.row)"
                        @blur="handleInputConfirm(scope.row)">
                        </el-input>
                        <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>
                      </template>
                    </el-table-column>
                    <el-table-column type="index"></el-table-column>
                    <el-table-column label="属性名称" prop="attr_name"></el-table-column>
                    <el-table-column label="操作">
                      <template slot-scope="scope">
                        <el-button size="mini" type="primary" icon="el-icon-edit" @click="editParamsBtn(scope.row)">编辑</el-button>
                        <el-button size="mini" type="danger" icon="el-icon-delete" @click="removeParams(scope.row)">删除</el-button>
                      </template>
                    </el-table-column>
                  </el-table>
                </el-tab-pane>
            </el-tabs>
        </el-card>
                  <!-- 添加参数对话框 -->
        <el-dialog
        :title="'添加'+addText"
        :visible.sync="adddialogVisible"
        width="50%"
        @close="addDialogClose">
        <el-form :model="addParamsForm" :rules="adddialogRules" ref="addDialogRef" label-width="100px" class="demo-ruleForm">
          <el-form-item :label="addText" prop="attr_name">
            <el-input v-model="addParamsForm.attr_name"></el-input>
          </el-form-item>
        </el-form>
        <span slot="footer" class="dialog-footer">
          <el-button @click="adddialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="addParams">确 定</el-button>
          </span>
        </el-dialog>
                <!-- 编辑参数对话框 -->
        <el-dialog
        title="修改参数"
        :visible.sync="editdialogVisible"
        width="50%"
        @close="editDialogClose">
        <el-form :model="editParamsForm" :rules="adddialogRules" ref="editDialogRef" label-width="100px" class="demo-ruleForm">
          <el-form-item label="新属性名称" prop="attr_name">
            <el-input v-model="editParamsForm.attr_name"></el-input>
          </el-form-item>
        </el-form>
        <span slot="footer" class="dialog-footer">
          <el-button @click="editdialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="addNewParams">确 定</el-button>
  </span>
</el-dialog>
    </div>
</template>
<script>
export default {
  data () {
    return {
      cateList: [],
      //   被选择的id值
      selecteCateKeys: [],
      cascaderConfi: {
        expandTrigger: 'hover',
        value: 'cat_id',
        label: 'cat_name',
        children: 'children'
      },
      //   被激活页签名称
      activeName: 'many',
      // 获取到的参数列表
      manyParamsData: [],
      onlyParamsData: [],
      // 添加参数对话框控制
      adddialogVisible: false,
      // 添加参数表单
      addParamsForm: {
        attr_name: ''
      },
      // 添加参数表单规则
      adddialogRules: {
        attr_name: [
          { required: true, message: '请输入参数名称', trigger: 'blur' }
        ]
      },
      // 修改参数对话框
      editdialogVisible: false,
      // 修改参数表单
      editParamsForm: {
        attr_name: '',
        attr_id: ''
      }
    }
  },
  computed: {
    isBtnDisabled () {
      if (this.selecteCateKeys.length !== 3) {
        return true
      }
      return false
    },
    cateId () {
      if (this.selecteCateKeys.length === 3) {
        return this.selecteCateKeys[2]
      }
      return null
    },
    addText () {
      if (this.activeName === 'many') {
        return '动态参数'
      } else {
        return '静态属性'
      }
    }
  },
  methods: {
    async getCateList () {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) return this.$message.error('获取商品分类失败')
      this.cateList = res.data
    },
    // 级联选择器发生变化
    async selecteChang () {
      if (this.selecteCateKeys.length !== 3) {
        this.selecteCateKeys = []
        this.manyParamsData = []
        this.onlyParamsData = []
        return
      }
      this.getParamsData()
    },
    //   tab页签点击事件的处理函数
    handleTabClick () {
      this.getParamsData()
    },
    // 获取商品参数
    async getParamsData () {
      if (!this.selecteCateKeys.length) return
      const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, {
        params: { sel: this.activeName }
      })
      if (res.meta.status !== 200) return this.$message.error('获取参数列表失败')
      res.data.forEach(item => {
        item.attr_vals = item.attr_vals ? item.attr_vals.split(' ') : []
        item.inputVisible = false
        item.inputValue = ''
      })
      if (this.activeName === 'many') {
        this.manyParamsData = res.data
      } else {
        this.onlyParamsData = res.data
        console.log(this.onlyParamsData)
      }
    },
    // 显示对话框
    showAddParams () {
      this.adddialogVisible = true
    },
    // 添加参数对话框关闭
    addDialogClose () {
      this.$refs.addDialogRef.resetFields()
    },
    // 提交参数
    addParams () {
      this.$refs.addDialogRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.post(`categories/${this.cateId}/attributes`,
          { attr_name: this.addParamsForm.attr_name, attr_sel: this.activeName })
        if (res.meta.status !== 201) return this.$message.error('添加失败')
        this.getParamsData()
        this.$message.success('添加成功')
        this.adddialogVisible = false
      })
    },
    // 编辑按钮获取参数
    editParamsBtn (row) {
      this.editParamsForm.attr_id = row.attr_id
      this.editParamsForm.attr_name = row.attr_name
      this.editdialogVisible = true
    },
    // 提交编辑后的参数
    addNewParams () {
      this.$refs.editDialogRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.put(`categories/${this.cateId}/attributes/${this.editParamsForm.attr_id}`, {
          attr_name: this.editParamsForm.attr_name,
          attr_sel: this.activeName
        })
        if (res.meta.status !== 200) return this.$message.error('修改参数失败')
        this.getParamsData()
        this.$message.success('修改参数成功')
        this.editdialogVisible = false
      })
    },
    // 编辑参数对话框关闭
    editDialogClose () {
      this.$refs.editDialogRef.resetFields()
    },
    // 删除静态参数
    async removeParams (row) {
      const confirmRes = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      if (confirmRes !== 'confirm') return this.$message.info('已取消删除')
      const { data: res } = await this.$http.delete(`categories/${row.cat_id}/attributes/${row.attr_id}`)
      if (res.meta.status !== 200) return this.$message.error('删除参数失败')
      this.getParamsData()
      this.$message.success('删除参数成功')
    },
    // 显示input标签
    showInput (row) {
      row.inputVisible = true
      // $nextTick 当页面被重新渲染之后,才会调用方法中的回调函数
      this.$nextTick(_ => {
        this.$refs.saveTagInput.$refs.input.focus()
      })
    },
    async handleInputConfirm (row) {
      if (row.inputValue.trim().length === 0) {
        row.inputValue = ''
        row.inputVisible = false
        return
      }
      row.attr_vals.push(row.inputValue.trim())
      row.inputValue = ''
      row.inputVisible = false
      this.saveEditRequest(row)
    },
    async saveEditRequest (row) {
      const { data: res } = await this.$http.put(`categories/${this.cateId}/attributes/${row.attr_id}`, {
        attr_name: row.attr_name,
        attr_sel: row.attr_sel,
        attr_vals: row.attr_vals.join(' ')
      })
      if (res.meta.status !== 200) return this.$message.error('添加失败')
      // row.attr_vals.push(row.inputValue.trim())
      row.inputValue = ''
      row.inputVisible = false
      this.$message.success('添加成功')
    },
    deleteParams (row, i) {
      row.attr_vals.splice(i, 1)
      this.saveEditRequest(row)
    }

  },

  created () {
    this.getCateList()
  }
}
</script>
<style lang="less" scoped>
.cat_opt{
    margin: 15px 0;
}
.el-tag {
  margin: 10px;
}
.input-new-tag{
  width:100px;
}
</style>
